The Rock Island Armory Rock Ultra FS is a dual-caliber 1911-style pistol chambered in 9mm Luger with an accessory barrel for the .22 TCM 9R. It has a 5-inch barrel, a single-action hammer-fired trigger, 10+1 capacity, and black parkerized finish. 
 

Key Specifications 

• Brand: Rock Island Armory 
• Model: Rock Ultra FS Combo 
• Caliber: 9mm Luger (9x19 Para) / .22 TCM 9R 
• Action: Single Action Only (SAO), hammer-fired 
• Capacity: 10+1 rounds 
• Barrel Length: 5 inches 
• Weight: 2.5 lbs. 
• Finish: Black Parkerized 
• Sights: Fiber Optic Front / Adjustable Rear 
• Grip Material: Black G10 
• Safety Type: Ambidextrous 
   

Detailed Features 

The single-action 1911 trigger gives a consistent pull with a short reset, suited for accurate follow-up shots. Fiber optic front sight improves acquisition in low light; the adjustable rear sight can be tuned for windage and elevation. Black G10 grips provide texture and are more durable than polymer in extended use. The ambidextrous safety works for either hand. The combo pairs the 9mm barrel with a .22 TCM 9R accessory barrel, which Armscor says should be fitted by a gunsmith. 
 

Usage Scenarios 

• Competitive Shooting: 5-inch barrel, adjustable sights, and short-reset SAO trigger suit match shooting formats where 1911-pattern pistols are permitted. 
• Training: .22 TCM 9R gives a lighter-recoiling, higher-velocity option on the same frame and controls. 
• Personal Defense: 10+1 in 9mm with an ambidextrous safety and full-size grip accommodates a wide range of shooters.

The dual-caliber capability is the primary draw. Owners appreciate being able to run .22 TCM for inexpensive practice and switch to 9mm for defensive use without buying a second pistol. The caliber change process is straightforward and gets positive marks for execution. The .22 TCM round itself gets interest for its high velocity and low recoil, particularly from new shooters and those who do high-volume practice.

Accuracy feedback is generally positive, with the fiber optic front and adjustable rear sights credited for making zeroing straightforward. Some owners report feeding and ejection quirks with specific ammunition, more often mentioned in the .22 TCM configuration than 9mm. Build quality discussions are largely favorable. The traditional 1911 profile with G10 grips and parkerized finish reads well in hand, and weight at 2.5 lbs is appreciated by shooters who find it stabilizing during sustained strings of fire.

The weight and size also come up as limitations for concealed carry. Most buyers treat this as a range, competition, or home defense pistol rather than a carry gun. Price-to-feature comparisons with other 1911-format pistols appear often in purchase discussions, and the dual-caliber combo is the feature that tips the value calculation for most buyers who choose it.

The first thing that stood out to me was the styling. It manages to look unmistakably classic while still having an elegant presence, and that balance is a big part of why I enjoy it. More importantly, mine has been very reliable. The shooting experience is comfortable and the recoil feels manageable, so it is easy to settle in and enjoy time with it. Nothing about the operation has distracted from the appeal of the design. I originally noticed the appearance, but the dependable function is what made the stronger impression after using it. This Rock Island combines handsome 1911 lines, pleasant recoil, and consistent operation in a way that feels cohesive rather than merely decorative. It has been both good looking and genuinely satisfying to shoot.